Diopter Post List 2017-05-03T05:54:04+00:00

Diopters.  We stopped calling glasses “prescriptions” a while back, since we don’t believe a reasonable educated individual needs a so-called professional to tell them which piece of clear, curved piece of plastic to buy.  (or conversely, keep you from making your own diopter choices)

If anything, we believe that most of the mainstream will give you more diopters than you need, causing progressive myopia and all sorts of long term risky side effects.  We feel strongly about education you on the subject of testing your own refraction, of making your own diopter choices.  Glasses are far less dangerous than lots of over-the-counter drugs!  Read this section for all things related to diopters, learn about the fascinating world of bending light (to your will).    

Pro Topic: Low Myopia & High Astigmatism (Video)

The question of low myopia and high astigmatism has come up multiple times in the BackTo20/20 support forum, this week. Low myopia, as in 1-2 diopters. High astigmatism, as in at least 2 diopters, likely even close to 3. Which to deal with first, spherical or cylinder, is always a question to answer for yourself before starting down the road of addressing your diopter needs.  One focal plane at a time, as uncle Jake likes to say. Best case scenario [...]

By |Focal Planes, How To's, Video|

New Glasses: Massive Eye Pain!

Have you ever left the optometrist's office with new glasses, and your eyes hurting like never before? "Oh you'll get used to it", they tell you. If you were to ask a sagely bearded eye guru, he'd probably tell you that you should go home and measure your own focal plane error and that you might have way more diopters than you need. Maybe.  Also look for diopter ratio changes, or changes to cylinder correction. This is the sort of [...]

(Another) DIY Diopter Measuring Tool

This post is if you, if you're looking to make your own diopter measuring tool. Of course first there is the whole topic of centimeters and diopters covered in various posts in the lens and diopter blog category.  And also of course with endmyopia being by far the largest and most comprehensive science based vision improvement resource online, readers and students have created various similar forms of diopter measuring tools. Adding to the list is this DIY solution, posted by Charleen: [...]

By |Focal Planes, How To's|

Taking New (Lowered Diopter) Glasses On Vacation?

If you're about to have a vacation coming up, and about to be ready for reduced normalized glasses, this article is for you! Discussion courtesy of the BackTo20/20 forum, and David: And centimeter gains! My comments: Familiar environments during focal plane changes, good idea. As with most things here it makes perfect sense once you know.  Make it easy for your visual cortex to sort out a focal plane change, by not also changing your visual environment at the same [...]

By |Focal Planes, Q&A|

Glasses vs. Contact Lenses: The Correct Focal Plane

Are your contact lenses and glasses the same exact (relative) correction?  They better be! Focal planes are the key to all things myopia.  Your eye being a dynamic system, constantly adjusting to seek ideal eyesight, uses focal plane feedback to calibrate itself.  This aspect of our biology is elegant and so complex that we barely begin to scratch the surface on how it works.   And yet ... we go monkey around with artificial focal plane changes, like it's no [...]

(Q&A) High Astigmatism, Low Myopia – Sph. To Cyl. Ratio Control

This Q&A, applicable if you have spherical correction at or below cylinder correction (high cyl to spherical ratio). A repost here from two BackTo20/20 support forum threads.  While I only provide case specific support in the forum, you might be able to come to your own relevant conclusions based on reviewing these scenarios.   Not sure if my mesurments are very accurate. Having a hard time telling where the actual blur starts. Think this is the astigmatism. For example this [...]

By |Astigmatism, Focal Planes|